An Alternate Route to High-Quality ZnSe and Mn-Doped ZnSe Nanocrystals

Acharya, S and Sarma, DD and Jana, NR and Pradhan, N (2010) An Alternate Route to High-Quality ZnSe and Mn-Doped ZnSe Nanocrystals. In: Journal of Physical Chemistry Letters, 1 (2). pp. 485-488.

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Abstract

We report here a synthetic route for high-quality Mn-doped ZnSe nanocrystals using selenourea as a selenium source, avoiding the more conventional route-using tributylphosphine (TBP) that restricts the growth of spherical ZnSe nanocrystals below 5 nm in size, besides being highly toxic and pyrophoric. Spherical ZnSe nanocrystals with unprecendented sizes (up to 12 nm) are synthesized, the large size of the host helps to keep dopant ions well inside the nanocrystal leading to intense and stable dopant emission. Mn-doped ZnSe nanocrystals with more than 50% quantum yield (QY) are synthesized in this method and found to be stable both in aqueous and nonaqueous dispersions for months.

Item Type:	Journal Article
Publication:	Journal of Physical Chemistry Letters
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	15 Jul 2010 05:46
Last Modified:	24 Feb 2012 06:06
URI:	http://eprints.iisc.ac.in/id/eprint/28894

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